A research study looked at variations in snail populations in urban areas compared to natural ecosystems outside of the urban development. Urban areas tend to be be warmer, trapping more solar energy and reflecting less light back out of the atmosphere. The
study found that brown snails were more commonly found in the natural ecosystem while yellow banded snails were found in the
urban, developed areas. Which statement best describes the distribution in the phenotypes for the snails in this scenario?
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A)
The variations in the snail populations are random and unrelated to the
locations.
B)
The variation in the snail population is due to sexual reproduction of the
snails in the urban development and asexual reproduction of the snails in
the natural ecosystem.
The variation in the snail population is due to mutations while the
distribution of colors in the population is due to genetic drift. The location Eliminate
of the colors a random process.
D)
The variation in the snail populations is due to mutations while the
distribution of colors in the population is due to the changes in
temperature in the two areas. Lighter colored snails survive with greater
frequency in the warmer urban development.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

im not intirely sure but i think the anwser is d relative humidity

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.